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83 lines
2.1 KiB
D
Executable File
83 lines
2.1 KiB
D
Executable File
#!/usr/sbin/dtrace -Zs
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/*
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* php_malloc.d - PHP libc malloc analysis.
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* Written for the PHP DTrace provider.
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*
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* $Id: php_malloc.d 53 2007-09-24 04:58:38Z brendan $
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*
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* This is an expiremental script to identify who is calling malloc() for
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* memory allocation, and to print distribution plots of the requested bytes.
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* If a malloc() occured while in a PHP function, then that function is
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* identified as responsible; else the caller of malloc() is identified as
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* responsible - which will be a function from the PHP engine.
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*
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* USAGE: php_malloc.d { -p PID | -c cmd } # hit Ctrl-C to end
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*
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* Filename and function names are printed if available.
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*
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* COPYRIGHT: Copyright (c) 2007 Brendan Gregg.
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*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at Docs/cddl1.txt
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* CDDL HEADER END
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*
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* 09-Sep-2007 Brendan Gregg Created this.
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*/
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#pragma D option quiet
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dtrace:::BEGIN
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{
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printf("Tracing... Hit Ctrl-C to end.\n");
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}
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php$target:::function-entry
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/arg0/
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{
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self->file = basename(copyinstr(arg1));
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self->name = copyinstr(arg0);
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}
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php$target:::function-return
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{
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self->file = 0;
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self->name = 0;
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}
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pid$target:libc:malloc:entry
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/self->file != NULL/
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{
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@malloc_func_size[self->file, self->name] = sum(arg1);
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@malloc_func_dist[self->file, self->name] = quantize(arg1);
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}
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pid$target:libc:malloc:entry
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/self->name == NULL/
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{
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@malloc_lib_size[usym(ucaller)] = sum(arg1);
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@malloc_lib_dist[usym(ucaller)] = quantize(arg1);
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}
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dtrace:::END
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{
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printf("\nPHP malloc byte distributions by engine caller,\n\n");
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printa(" %A, total bytes = %@d %@d\n", @malloc_lib_size,
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@malloc_lib_dist);
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printf("\nPHP malloc byte distributions by PHP file and ");
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printf("function,\n\n");
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printa(" %s, %s, bytes total = %@d %@d\n", @malloc_func_size,
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@malloc_func_dist);
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}
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